Ongoing Compressional Tectonism and Regional Seismic Hazard Revealed by the 2023 <i>M</i>w6.1 Jishishan Earthquake

Xiaoning Hu; Chen Yu; Zhenjiang Liu; Yingying Zhang; Zhenhong Li; Chuang Song; Bingquan Han; Haihui Liu; Jie Li

doi:10.1007/s12583-024-0126-9

Volume 36 Issue 1

Feb 2025

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Journal of Earth Science > 2025 > 36(1): 275-290.

Xiaoning Hu, Chen Yu, Zhenjiang Liu, Yingying Zhang, Zhenhong Li, Chuang Song, Bingquan Han, Haihui Liu, Jie Li. Ongoing Compressional Tectonism and Regional Seismic Hazard Revealed by the 2023 Mw6.1 Jishishan Earthquake. Journal of Earth Science, 2025, 36(1): 275-290. doi: 10.1007/s12583-024-0126-9

Citation:

Xiaoning Hu, Chen Yu, Zhenjiang Liu, Yingying Zhang, Zhenhong Li, Chuang Song, Bingquan Han, Haihui Liu, Jie Li. Ongoing Compressional Tectonism and Regional Seismic Hazard Revealed by the 2023 Mw6.1 Jishishan Earthquake. Journal of Earth Science, 2025, 36(1): 275-290. doi: 10.1007/s12583-024-0126-9

Citation:

Xiaoning Hu, Chen Yu, Zhenjiang Liu, Yingying Zhang, Zhenhong Li, Chuang Song, Bingquan Han, Haihui Liu, Jie Li. Ongoing Compressional Tectonism and Regional Seismic Hazard Revealed by the 2023 Mw6.1 Jishishan Earthquake. Journal of Earth Science, 2025, 36(1): 275-290. doi: 10.1007/s12583-024-0126-9

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Ongoing Compressional Tectonism and Regional Seismic Hazard Revealed by the 2023 Mw6.1 Jishishan Earthquake

doi: 10.1007/s12583-024-0126-9

Xiaoning Hu^{1, 2, 3
,},
Chen Yu^{1, 2, 4
,
,
,},
Zhenjiang Liu^{1, 2, 3},
Yingying Zhang⁵,
Zhenhong Li^{1, 2, 4},
Chuang Song^{1, 2, 4},
Bingquan Han^{1, 2, 3},
Haihui Liu^{1, 2, 3},
Jie Li^{1, 2, 3}

1.
College of Geological Engineering and Geomatics, Chang'an University, Xi'an 710054, China
2.
Key Laboratory of Loess, Xi'an 710054, China
3.
Big Data Center for Geosciences and Satellites, Chang'an University, Xi'an 710054, China
4.
Key Laboratory of Western China's Mineral Resources and Geological Engineering, Ministry of Education, Xi'an 710054, China
5.
China Earthquake Networks Center, Beijing 100045, China

More Information

Corresponding author: Chen Yu, chen.yu@chd.edu.cn
Received Date: 15 Apr 2024
Accepted Date: 22 Oct 2024

Available Online: 10 Feb 2025

Issue Publish Date: 28 Feb 2025

Abstract

Abstract

On December 18, 2023, a Mw6.1 earthquake struck Jishishan County, Gansu Province, China, marking the most significant earthquake in the northeastern edge of the Tibetan Plateau since 2000. Given its proximate to the Loess Plateau, which is extremely susceptible to geohazards, this earthquake raises awareness about the seismic hazard of several mega-cities such as Xi'an in Northwest China. In this paper, we inferred that the rupture occurred on an east-dipping backthrust, resulting from the regional E-W contraction tectonic setting. Our dynamic model through teleseismic waves and static model through radar displacement measurements together reveal a unilateral, along-strike rupture, encountering a slip barrier at one side of the main slip patch causing a cluster of aftershocks. We also identified a high-dip structure, which is an early-stage backthrust fault whose dip becomes increasingly high due to regional compressional tectonism. Apart from the loaded fault segments, particularly on the fault linkage, which necessitate continuous examination, a detailed seismic hazard assessment of the west Qinling and Daotanghe-Linxia fault system identifies a seismic gap between Weiyuan and Dingxi with the potential for a Mw7.5 earthquake. Collectively, these findings provide valuable insights into the seismic behavior of the seismogenic fault as well as guidance on hazard mitigation in its surrounding fault systems.
- 2023 Jishishan Earthquake,
- dynamic rupture process,
- coseismic displacements,
- seismic hazard assessment,
- fault slips,
- mechanics

Conflict of Interest
The authors declare that they have no conflict of interest.

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References(98)

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